The issue of hazardous wrecks is a complicated one. Currently, we do not know how big the problem is or even if we have a problem at all where the environment or food safety are concerned. More research is required, and a sound policy framework needs to be developed. A good start could be to start compiling a database, accessible for national authorities, of wrecks that are known to contain munitions so that more effective decisions can be made.
Countless ships and aircraft were lost at sea in the two world wars. Many of these went down with a large amount of fuel and munitions onboard, not to.